# Stationary UPS battery Long WP9B-4 12V 8Ah AGM ![Stationary UPS battery Long WP9B-4 12V 8Ah AGM](https://baterias.com/1353-home_default/battery-long-wp9b-4-12v-8ah.jpg) > Long WP9B-4 stationary UPS battery 12V 8Ah AGM. Starting Series range. Dimensions 150Γ—69Γ—105 mm. Long float life for UPS, alarms and standby equipment. **Category:** [Car Batteries](https://baterias.com/gb/car-batteries) β†’ [LONG](https://baterias.com/gb/long) - **Canonical URL**: https://baterias.com/gb/battery-long-wp9b-4-12v-8ah - **Language**: en-GB - **Brand**: LONG - **Reference**: BCOM-LONG-WP9B-4 - **MPN**: WP9B-4 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | LONG | | Reference | WP9 B-4 | | Model | Starting Series | | Voltage (V) | 12 V | | Largo | 150 cm | | Ancho | 69 cm | | Alto | 105 cm | | Peso | 3.46 kg | | TecnologΓ­a | AGM | | Capacity (C20) | 8 Ah (c20) | | Capacity (C5) | 6.8 Ah (c5) | ## Quick description **Long WP9B-4 12V 8Ah** is a stationary battery for backup power systems: UPS, alarms, telecom and emergency lighting. Long float-life under permanent charge and instant response to mains outages with no noticeable voltage drop. ### Why this stationary battery? - **Instant response** when the mains drop, no voltage dip - **Long life under 24/7 charge** optimised for permanent service - **Compatible with your system** existing UPS units and alarm control panels πŸ”Œ Voltage 12 V ⚑ Capacity 8 Ah C20 πŸ“ Dimensions 150Γ—69Γ—105 mm βš™οΈ Technology AGM βš–οΈ Weight 3,46 kg 🏷️ Model Starting Series ## Description ## Car battery Long WP9B-4 Starting Series 8Ah 12V 12*V* Voltage 8*Ah* Capacity 3.46*kg* Weight With **8 Ah** at **12 V**, the **Long WP9B-4** from the **Starting Series** range is a starter battery built for passenger cars with conventional starting, without a Start-Stop system. It replaces the original battery without adaptation in cars with a 150 Γ— 69 Γ— 105 mm format: same 8 Ah capacity. - Direct replacement for the original battery in size and terminals. - Original-equipment build quality without the dealership price. - AGM technology: absorbed electrolyte, no spills, can be mounted at an angle. - Reliable cold starts, even after weeks without driving. ### Size, terminals and hold-down of the Long WP9B-4 It has external dimensions of 150 Γ— 69 Γ— 105 mm and weighs 3.46 kg. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change. ### What the Long WP9B-4 is for The Long WP9B-4 covers the needs of passenger cars with conventional starting, without a Start-Stop system: reliable starting, stable voltage for the electronics and a service life of several years in daily use. Check that it matches your current battery in size and terminal position. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 3.46 kg. ### The Long WP9B-4: Starting Series range and AGM technology Within the Long catalogue, the **Starting Series** series groups the references designed for this use. The WP9B-4 is the 8 Ah model of that family, with the same performance as its siblings in other sizes. AGM (Absorbent Glass Mat) technology seals the electrolyte in glass microfibre. The result is a maintenance-free battery that is highly vibration-resistant and able to withstand deep discharges that would ruin a classic lead-acid battery. ### What Long does differently Long batteries combine large-scale production with ISO quality standards and a batch-to-batch consistency that has made them the de-facto standard in backup systems and electric mobility. All the Long batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### Official warranty The Long WP9B-4 comes with the **manufacturer's official warranty** against manufacturing defects; the exact period is stated in the brand's conditions. If it fails through a defect within the period, we replace it free of charge. ### Usage and maintenance tips In normal daily use the alternator keeps the battery charged; if the car stands for weeks, a maintenance charge once a month prevents deep discharge. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. ### When you get it and how to return it Order **before [[ks:cutoff]]** with stock available and it leaves today: mainland Spain and Portugal receive it in 24-48 working hours, the islands and the rest of the EU in 3 to 5 days. You have **[[ks:return_days]] days** to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email. ## Frequently asked questions ### Is the WP9B-4 model AGM? What does this technology offer? Yes. The WP9B-4 from Long uses AGM (Absorbent Glass Mat) technology: a sealed lead-acid battery where the electrolyte is absorbed in a glass-fibre mat. It withstands more charge/discharge cycles than a conventional one, handles heat better and is the required technology for cars with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions. ### Is the Long WP9B-4 battery suitable for Start-Stop? Yes. As AGM technology it is designed for Start-Stop vehicles. AGM batteries support advanced Start-Stop and regenerative braking thanks to their higher cycle count. EFB is recommended for basic Start-Stop; AGM is recommended when regenerative braking is also present, thanks to its higher cycle capability. It works straight out of the box β€” on most modern vehicles registering the battery via OBD is recommended so the alternator automatically applies the optimal charging profile. ### How do I fit the WP9B-4 model in my car? In most cars it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (βˆ’) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation β€” match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (βˆ’). On cars with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### How long does the Long WP9B-4 battery last? Expected lifespan of the Long WP9B-4 is 5 to 8 years in mild-climate car use with Start-Stop. In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured. ### What are the dimensions of the Long WP9B-4 battery? Dimensions (length Γ— width Γ— height) are 150Γ—69Γ—105 mm β€” also written as 150x69x105 mm β€” following the European DIN standard. Always measure the space in your car before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals. ### Will the Long WP9B-4 battery fit my car? Three options to confirm: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year β€” we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The WP9B-4 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the WP9B-4 model? Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology β€” an EFB cannot be replaced with a conventional battery in Start-Stop cars. See the "Equivalents" section to view recommended options at the same performance level. ### When do I need an AGM battery like this one? AGM (Absorbent Glass Mat) technology uses absorbent fibreglass that retains the electrolyte, eliminating leaks and allowing up to 3Γ— more charge/discharge cycles than a conventional battery. It is the recommended option when the car has advanced Start-Stop with regenerative braking (BMW EfficientDynamics, Mercedes Eco, Audi MHEV, Land Rover ECO, Volvo i-Stop). Withstands tilted positions, high vibration and extreme temperatures better than EFB. The Long WP9B-4 is fully original and meets European EN 50342-6 standards for advanced Start-Stop. ### Do I need to register the Long WP9B-4 on the car after installation? On most cars it is not strictly necessary β€” the alternator detects the new battery and adapts the charge automatically. It is recommended to register the battery via OBD so that the alternator applies the optimal charging profile from the first minute and extends the battery life as much as possible (especially on brands with sophisticated BMS: BMW, Mercedes, Audi, Volvo, Land Rover). Any workshop with an OBD scanner (~10-15 € labour) does it in 5 minutes. DIY apps: VCDS / Carista (VAG), Bimmercode (BMW), iCarsoft. If you do not register, the car will still start correctly β€” the alternator just takes a few days to adjust the profile. The Long WP9B-4 ships factory-charged at 80-90% so you can use it straight after fitting. ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team β€” over 25 years of experience validating automotive batteries. β†’ https://baterias.com/gb/technical-team --- *baterias.com β€” Automotive batteries Β· 2026-10-04*